Greater London · England
External & façade joints in Dollis Hill, Greater London
Our applicators work in Dollis Hill on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Weeds or debris growing in open joints
- Cracked joints where brick meets render or frames
- Hard, crazed mastic that has stopped moving
Common questions in Dollis Hill
Is parking a problem for a job in Dollis Hill?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Can you help a landlord with a rental near Brent Cross West station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Do you work at height?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher ones, send details and we’ll confirm the access.
How much does external mastic cost in Dollis Hill?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before work begins.
Will the new joint stand out?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best so the joint doesn’t draw the eye.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Do you have insurance?
Yes. We’re fully insured, and we can confirm the details when we quote.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll tell you how long to leave the joint before we leave.
External mastic in Dollis Hill, done properly
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a matching colour. We work on render & cladding joints, copings & trims and brickwork movement joints, and the jobs we see most are sealant that has lost its bond to the brick or render and panel joints letting water in.
Modern London flats rely on sealed movement joints and cladding joints. Older terraces have their own weak points: gutter joints, roofline trims and the joint where an extension meets the original wall.
All of our work is guaranteed for twelve months, in Dollis Hill and everywhere else we cover.
- Place
- Dollis Hill (NW2, NW10, NW9)
- Region
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
When to call us in Dollis Hill
UV, rain and frost all age exterior sealant. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
The most common problems we see are:
- Weathered mastic that no longer stretches
- Leaking joints around cladding and façade panels
- Movement joints with cracked, split or missing sealant
- Failed seals between different materials
Homes close to Church of St Michael include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Questions to ask before booking
- Are they insured?
- Who does the work, and how experienced they are
- What preparation is included
- When the joint can take water or movement
Places near Dollis Hill
Other services in Dollis Hill
Honest limits
It helps to know what we can’t do:
- Subsidence or other structural problems
- Rising or penetrating damp from elsewhere in the wall
- Loose or hollow render, which needs re-rendering
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Surfaces we seal
- Façade panels
- Brickwork movement joints
- Render & cladding joints
- Concrete & block
- Joints between brick and frames
- Copings & trims
Leave it or put it right?
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Dollis Hill, the repair is bigger than a sealant job.
Combining jobs into one visit is normally more efficient than separate visits. We’ll give you a clear quote for the lot.
Why Dollis Hill clients choose us
- Any old sealant cut out fully, not covered over
- One-year guarantee on every job
- Domestic, commercial and hotel work
- We’re fully insured
See what affects the cost and our reviews.
How it works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours to a few days, depending on the length of joint and the access, and the area is left clean. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Dollis Hill. A visitor permit or a nearby bay makes the visit run more smoothly.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Clear items away from the joints we are working on
- Keep pets and children clear of the area while we work
- Mention if the joints have been sealed before
Get a quote
For a quote, call 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Read more
How to look after the new joints
Joint life depends on how it’s used and looked after. We suggest:
- Show decorators and builders where the movement joints are
- Look over the joints every year, ideally after winter
- Make sure movement joints aren’t pointed over
- Wash walls gently around the sealant
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick, all bigger jobs than a reseal.
What external mastic looks like in Dollis Hill
In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts. Historic houses like Heath House (about 2.3 miles east) are a reminder that the area around Dollis Hill has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
Dollis Hill is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. Letting a property close to Brent Cross West station? Then split movement joints are easy to miss on a rental until damp shows inside.
Dollis Hill is about 1 mile north-east of Neasden, in Greater London. Every kind of property in Dollis Hill is covered for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Across Greater London, we cover 764 places, and Dollis Hill is one of them. We also work in London, around 7 miles away.
Jobs for external mastic in NW2, NW10 and NW9 is quoted and booked the same way as anywhere else. Streets in the area include Brook Road, Lane Close and Crest Road. We also cover Staples Corner (1 mile north-east), Neasden (1 mile south-west), Cricklewood (1 mile south-east), Willesden (1 mile south) and Brent Cross (1 mile north-east). We also work in nearby towns such as London (7 miles south-east), City of Westminster (5 miles south-east), Marylebone (5 miles south-east), Kensington (5 miles south), St Pancras (6 miles south-east) and Shoreditch (7 miles east).
Landmarks near Dollis Hill
Around Dollis Hill, our work takes us to homes and buildings near Woodfield School, The Crown Public House and Gladstone Park and the streets around them. Dollis Hill has its own railway station: Brent Cross West station. Nearby you’ll also find Brent Cross Shopping Centre (1 mile north-east) and St Andrew's Hospital (under half a mile south). Green spaces nearby include Darland's Lake and Parliament Hill.
Different surfaces, different methods
Render joints
Cracks along render joints let water in behind the coat. Resealing the joints early keeps water out and protects the render itself.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
For landlords and businesses
If you manage several properties in or around Dollis Hill, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.